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From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-scsi@vger.kernel.org
Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com,
	hare@suse.de, Damien.LeMoal@wdc.com
Subject: [PATCH v21 32/46] sg: add some __must_hold macros
Date: Sun,  3 Oct 2021 12:31:37 -0400	[thread overview]
Message-ID: <20211003163151.585349-33-dgilbert@interlog.com> (raw)
In-Reply-To: <20211003163151.585349-1-dgilbert@interlog.com>

In the case of sg_wait_open_event() which calls mutex_unlock on
sdp->open_rel_lock and later calls mutex_lock on the same
lock; this macro is needed to stop sparse complaining. In
other cases it is a reminder to the coder (a precondition).

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
---
 drivers/scsi/sg.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 7e088d9cda4e..a7eebc1d5407 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -375,6 +375,7 @@ sg_check_file_access(struct file *filp, const char *caller)
 
 static int
 sg_wait_open_event(struct sg_device *sdp, bool o_excl)
+		__must_hold(sdp->open_rel_lock)
 {
 	int res = 0;
 
@@ -1728,6 +1729,7 @@ sg_ctl_sg_io(struct file *filp, struct sg_device *sdp, struct sg_fd *sfp,
  */
 static int
 sg_set_reserved_sz(struct sg_fd *sfp, int want_rsv_sz)
+		__must_hold(sfp->f_mutex)
 {
 	int new_sz, blen, res;
 	unsigned long iflags;
@@ -3579,12 +3581,12 @@ sg_remove_sfp(struct kref *kref)
 
 static int
 sg_idr_max_id(int id, void *p, void *data)
+		__must_hold(sg_index_lock)
 {
 	int *k = data;
 
 	if (*k < id)
 		*k = id;
-
 	return 0;
 }
 
@@ -3887,6 +3889,7 @@ sg_proc_seq_show_devstrs(struct seq_file *s, void *v)
 /* Writes debug info for one sg_request in obp buffer */
 static int
 sg_proc_debug_sreq(struct sg_request *srp, int to, char *obp, int len)
+		__must_hold(sfp->srp_arr.xa_lock)
 {
 	bool is_v3v4, v4, is_dur;
 	int n = 0;
@@ -3989,6 +3992,7 @@ sg_proc_debug_fd(struct sg_fd *fp, char *obp, int len, unsigned long idx)
 /* Writes debug info for one sg device (including its sg fds) in obp buffer */
 static int
 sg_proc_debug_sdev(struct sg_device *sdp, char *obp, int len, int *fd_counterp)
+		__must_hold(sg_index_lock)
 {
 	int n = 0;
 	int my_count = 0;
-- 
2.25.1


  parent reply	other threads:[~2021-10-03 16:38 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-03 16:31 [PATCH v21 00/46] sg: add v4 interface Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 01/46] sg: move functions around Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 02/46] sg: remove typedefs, type+formatting cleanup Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 03/46] sg: sg_log and is_enabled Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 04/46] sg: rework sg_poll(), minor changes Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 05/46] sg: bitops in sg_device Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 06/46] sg: make open count an atomic Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 07/46] sg: move header to uapi section Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 08/46] sg: speed sg_poll and sg_get_num_waiting Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 09/46] sg: sg_allow_if_err_recovery and renames Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 10/46] sg: improve naming Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 11/46] sg: change rwlock to spinlock Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 12/46] sg: ioctl handling Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 13/46] sg: split sg_read Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 14/46] sg: sg_common_write add structure for arguments Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 15/46] sg: rework sg_vma_fault Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 16/46] sg: rework sg_mmap Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 17/46] sg: replace sg_allow_access Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 18/46] sg: rework scatter gather handling Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 19/46] sg: introduce request state machine Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 20/46] sg: sg_find_srp_by_id Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 21/46] sg: sg_fill_request_element Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 22/46] sg: printk change %p to %pK Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 23/46] sg: xarray for fds in device Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 24/46] sg: xarray for reqs in fd Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 25/46] sg: replace rq array with xarray Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 26/46] sg: sense buffer rework Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 27/46] sg: add sg v4 interface support Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 28/46] sg: rework debug info Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 29/46] sg: add 8 byte SCSI LUN to sg_scsi_id Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 30/46] sg: expand sg_comm_wr_t Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 31/46] sg: add sg_iosubmit_v3 and sg_ioreceive_v3 ioctls Douglas Gilbert
2021-10-03 16:31 ` Douglas Gilbert [this message]
2021-10-03 16:31 ` [PATCH v21 33/46] sg: move procfs objects to avoid forward decls Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 34/46] sg: protect multiple receivers Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 35/46] sg: first debugfs support Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 36/46] sg: rework mmap support Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 37/46] sg: defang allow_dio Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 38/46] sg: warn v3 write system call users Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 39/46] sg: add mmap_sz tracking Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 40/46] sg: remove rcv_done request state Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 41/46] sg: track lowest inactive and await indexes Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 42/46] sg: remove unit attention check for device changed Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 43/46] sg: no_dxfer: move to/from kernel buffers Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 44/46] sg: add blk_poll support Douglas Gilbert
2021-10-03 16:31 ` [PATCH v21 45/46] sg: add statistics similar to st Douglas Gilbert
2021-10-04  5:59   ` Hannes Reinecke
2021-10-05  3:34   ` Damien Le Moal
2021-10-03 16:31 ` [PATCH v21 46/46] sg: bump version to 4.0.12 Douglas Gilbert
2021-10-04  7:07 ` [PATCH v21 00/46] sg: add v4 interface Johannes Thumshirn

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